Macbeth was the last Celtic King of Scotland who ruled from 1040 to 1057. He was important as he was the mormaer of Moray. His father, Findlaech Mac Ruaridh, was killed. Macbeth killed Gillacomgain, one of Findlaech’s nephews who was involved in Findlaech’s killing. Macbeth then married Gillacomgain’s widow, Gruoch, and adopted her son Lulach by her former husband, Gillacomgain. Due to Celtic succession tradition, Macbeth had a legitimate claim to the crown. In Scotland, the succession of the crown alternated between two main branches of the royal house. Duncan’s grandfather King Malcolm II killed potential rivals so Duncan would become king against Celtic customs. After Macbeth killed King Duncan, he became king. Duncan’s father, Abbot Crinan,
